Costume Quest Achievements Here is the full list of all 21 Costume Quest achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc Flag Filter All None 21 Offline Mode 21 Single Player 5 Main Storyline 5 Collectable 4 Cumulative + 1 Shop 1 Time/Date Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply Leave some for the rest of us!Collect a total of over 4,000 candies. Battle BudsDefeat a monster in combat with a friend by your side. Binary BouncerUse the Robot Costume to Boost off of 15 different ramps. Do the Monster BashGet the jump on 10 different monsters by pail bashing them to initiate combat. Make it WorkWin the Autumn Haven Mall Costume Contest. Dressed to QuestAcquire 5 Costumes. The Last GourdianAcquire the Pumpkin Costume. Master of DisguiseUse every Costume Ability in battle. Downsized!Defeat BoJonn in battle. Dozer DodgerDefeat Metxel in battle. Sweet JusticeBeat the game. Mask-O'-RaiderComplete all Quests in the game. All Decked OutCollect all Creepy Treat Cards. They'll be worth a lot somedayCollect all Battle Stamps. Chompin' ChampWin all prizes in Bobbing for Apples. Jeepers PeepersAcquire the Eyeball costume. Playin' HookyUse the Pirate hook on 5 unique ziplines. Revolutionary HeroComplete all quests in Repugia. Birdbrain BeatdownDefeat Araxia in battle. Short StackFind the mysterious visitor in the cliffs of Repugia. Tisn't the SeasonPlay Costume Quest on Christmas. 1 guide